[j-nsp] explicit-null

[Stacy W. Smith]

See RFC 4182.

--Stacy

On Oct 9, 2008, at 9:24 AM, <david.roy at orange-ftgroup.com> <david.roy at orange-ftgroup.com 
 > wrote:

>
> For the Q2 : extracted from the RFC 3032 :
>
> "MPLS Label Stack Encoding :
>
> A value of 0 represents the "IPv4 Explicit NULL Label". This label  
> value is only legal at the bottom of the label stack. It indicates  
> that the label stack must be popped, and the forwarding of the  
> packet must then be based on the IPv4 header."
>
>
> So, Junos is not compliant of the RFC ???
>
> David
>
>
>
> -----Message d'origine-----
> De : Danny Vernals [mailto:danny.vernals at gmail.com]
> Envoyé : jeudi 9 octobre 2008 17:15
> À : ROY David DTF/DERX
> Cc : juniper-nsp at puck.nether.net
> Objet : Re: [j-nsp] explicit-null
>
> On Wed, Oct 1, 2008 at 11:03 AM,  <david.roy at orange-ftgroup.com>  
> wrote:
>>
>> Hi all,
>>
>> When I use Explicit null on my Egress router (in LDP), The Egress
>> advertises label 0 for its FEC : good.
>>
>> Q1:  I use MPLS VPN, therefore I have 2 Labels in the stack. The
>> penultimate LSR replaces the value of  the top label per 0. The  
>> router
>> keeps the EXP info and the second Label.  Is-it true ?
>>
>
> yes
>
>> Q2: When the Juniper egress router receives the Label 0, It removes  
>> it
>> and performes a lookup on the second labal ? Is-it true ?
>>
>
> yes
>
> Are you seeing behaviour that seems to conflict with this?
>
>> Thanks
>> David
>>
>>
>>
>>
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>
> *********************************
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> Any unauthorised use or dissemination is prohibited.
> Messages are susceptible to alteration.
> France Telecom Group shall not be liable for the message if altered,  
> changed or falsified.
> If you are not the intended addressee of this message, please cancel  
> it immediately and inform the sender.
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